Search results
- coal, coking coal), lignite has a low energy content i.e. a low calorific ... Despite its low energy content, lignite is one of the few primary ...19 KB (2,752 words) - 13:55, 12 June 2024
- environment to make products or to produce energy. When their life cycle ends ... # materials extracted to make products or be used as a source of energy; ...38 KB (5,721 words) - 17:55, 6 February 2024